A FeNO test is a fractional exhaled nitric oxide test that measures the amount of nitric oxide in your breath.

The body produces Nitric oxide when it is inflammation in the airways. A higher amount of nitric oxide can show inflammation in the airways and can help diagnose conditions that result from a sensitivity to allergens.

Here is a look at how nitric oxide tests work.

A nitric oxide test is simple and safe.

“The test is similar to other tests and involves blowing into a handheld device. You will get your results on the same visit after you complete testing in your doctor’s office.”

To begin, you need to have a clip over your nose and a mouth. Next, you will exhale and then hear a sound. You will repeat this process a few times.

Your doctor monitors your breathing during the test.

“A test for nitric oxide doesn’t require much preparation. It is best to avoid these an hour before the test so that they don’t affect your results.”

  • It is a drug that has a lot of caffeine.
  • Alcohol.
  • smoking
  • Foods with nitrate-rich contents include beets and green leafy vegetables.

The results of your test can tell you if there is swelling or inflammation in your airway. Inflammation is indicated by higher than normal results.

The amount of exhaled nitric oxide is measured in billions. Adults and children can get more than 40 and 25 parts per billion.

Your doctor may use a stethoscope and a fractional exhaled nitric oxide test to look for signs of wheezing, and they may also listen to your breathing with a stethoscope.

A doctor might ask about other symptoms. Symptoms can happen along with high nitric oxide levels.

  • coughing
  • The chest is tight.
  • Difficult breathing

A doctor might also order the following pulmonary function tests:

1. Spirometry

The amount of air you breathe in and out of your lungs is measured. This helps determine how well your lungs work.

A machine connected to a mouth will allow you to inhale and exhale.

2. Challenge test

The doctor might suggest a challenge test if the activities or substances cause symptoms.

You will take a spirometry test if you have a possible triggering event such as physical activity or an allergy.

3. Bronchodilators

It can be difficult to complete lung function tests on children. If a child has signs of asthma, doctors might prescribe a bronchodilator. The medications open the airway and make breathing easier.

Asthma is a likely diagnosis if the medication improves their symptoms.

4. Pulse oximetry tests

The test involves wearing a pulse oximeter on your finger and measuring the oxygen in your red blood cells.

Normal oxygen levels show healthy lung function, but low levels can show a respiratory issue.

5. Imaging tests

Symptoms of allergic conditions can mimic other conditions.

The doctor might use an X-ray or CT scan of your chest and sinuses to rule out other conditions, or order an upper endoscopy or phlegm sample to rule out acid reflux and infections, respectively.

There is a low risk of side effects with a nitric oxide test. Lightheadedness might be caused by breathing in and out.

If your insurance provider considers the test medically necessary, you can get coverage for it. Contact your insurance provider to confirm coverage.

copays to your provider and medical deductibles are possible if your policy covers testing. The deductible is the amount of money you pay before your insurance covers a test.

The cost of testing without insurance can be as high as $3,000.

A doctor will decide the best course of treatment if a nitric oxide test confirms a diagnosis.

Treatment might include an inhaled corticosteroid to reduce airway inflammation and quick relief bronchodilators to open up the airways. If There are allergies. trigger your symptoms, the doctor might prescribe allergy medication or recommend allergy shots as well.

If you have been diagnosed with an allergy, the doctor can adjust your medication to better manage symptoms. If you have severe symptoms, you can add an inhaler with a corticosteroid.

Some respiratory conditions can make it difficult to breathe and do physical activity. A test for nitric oxide is the first step to diagnose a condition, and it can also assess whether treatment is working.

“This test is relatively easy to do and can give you a diagnosis before you leave the doctor’s office.”